The Ivorian striker returned to Stamford Bridge last month, having only departed the west Londoners two years ago following an eight-year stay with the Premier League giants.
Drogba had missed last weekend’s league win over Swansea City with an ankle injury, but recovered in time to play from the start in Tuesday’s Champions League Group G opener against Schalke.
And although Drogba, who netted 157 goals during his initial stay between 2004 and 2012, was unable to find the back of the net against the Germans, he is convinced he will soon be back to his very best form.
“For a first game they were okay, kind of okay,” Drogba, who left Stamford Bridge after scoring the decisive penalty in the 2012 European Cup win, told Chelsea TV.
“The good thing is no pain in the ankle, so now I can start working and training and improve the condition.
“I was feeling much better in the second half. I’m like a diesel, I need time.”